Bump actions/download-artifact from 5 to 6 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/sync-labels-npm.yml

@@ -122,7 +122,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Download configuration file artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           merge-multiple: true
           pattern: ${{ env.CONFIGURATIONS_ARTIFACT_PREFIX }}*

.github/workflows/test-install-script.yml

@@ -76,7 +76,7 @@ jobs:
 
     steps:
       - name: Download script artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ env.SCRIPT_ARTIFACT_NAME }}
 
@@ -120,7 +120,7 @@ jobs:
           echo "BINDIR=${{ runner.temp }}/custom-installation-folder" >>"$GITHUB_ENV"
 
       - name: Download script artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ env.SCRIPT_ARTIFACT_NAME }}
 
@@ -165,7 +165,7 @@ jobs:
 
     steps:
       - name: Download script artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ env.SCRIPT_ARTIFACT_NAME }}
 
@@ -207,7 +207,7 @@ jobs:
 
     steps:
       - name: Download script artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ env.SCRIPT_ARTIFACT_NAME }}
 
@@ -260,7 +260,7 @@ jobs:
           echo "SECOND_BINDIR=${{ runner.temp }}/${SECOND_INSTALLATION_FOLDER}" >>"$GITHUB_ENV"
 
       - name: Download script artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ env.SCRIPT_ARTIFACT_NAME }}